Effect of argon additive in negative hydrogen ion sources
Effect of argon additive in negative hydrogen ion sources
复制标题
负氢离子源中氩气添加剂的影响
DOI：
10.1063/1.1430880
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发表时间：
2002
影响因子：
1.6
通讯作者：
H. Yamaoka
中科院分区：
文献类型：
--
作者：
M. Bacal;M. Nishiura;M. Sasao;M. Hamabe;M. Wada;H. Yamaoka
利用光剥离技术研究了磁过滤多尖离子源在氢中加入氩时引出区的氢负离子密度。我们发现，当氩气加入到低的基础氢压力（0.05或0.1 Pa）时，负离子密度最多增加1.5倍，但当氩气加入到较高的初始氢压力（0.5或1 Pa）时，负离子密度下降。添加氩气并没有增强真空紫外线中的Werner和莱曼带，这表明氩气添加并没有增加振动激发的H2分子的产生速率。在低压氢气放电中加入氩气使负离子密度增加，可能是由于低能电子密度增加。
Using the photodetachment technique we investigated the hydrogen negative ion density in the extraction region of a magnetically filtered multicusp ion source when argon is added to hydrogen. We found that the negative-ion density goes up at most by a factor of 1.5 when argon is added to low base hydrogen pressure (0.05 or 0.1 Pa), but goes down when argon is added to higher initial hydrogen pressure (0.5 or 1 Pa). Adding argon did not enhance the Werner and Lyman bands in the vacuum ultraviolet, which indicates that argon addition does not increase the production rate of vibrationally excited H2 molecules. The increase of the negative-ion density by adding argon into a low-pressure hydrogen discharge is probably due to the increase of the low-energy electron density.